Square of a number: If a number is multiplied by itself, then the result is called the square of that number. In other words, the square of a number is that number raised to the power 2. Ex: 12 × 12 = 122 = 144So 144 is the square of 12.

Mathematically, we can say that: if 'm' and 'n' are two numbers such that m * m = n, then 'n' is the 'square of m' and called as 'square number'. For example, in the product 8 * 8 = 64, 64 is the square number.